linux-kernel - [PATCH v1 2/4] gpio: dwapb: Read GPIO base from gpio-base property

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Date:   Mon, 26 Jul 2021 15:54:34 +0300
From:   Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Serge Semin <Sergey.Semin@...kalelectronics.ru>,
        Lee Jones <lee.jones@...aro.org>, linux-kernel@...r.kernel.org,
        linux-gpio@...r.kernel.org
Cc:     Hoan Tran <hoan@...amperecomputing.com>,
        Serge Semin <fancer.lancer@...il.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: [PATCH v1 2/4] gpio: dwapb: Read GPIO base from gpio-base property

For backward compatibility with some legacy devices introduce
a new (*) property gpio-base to read GPIO base. This will allow
further cleanup of the driver.

*) Note, it's not new for GPIO library since mockup driver is
   using it already.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/gpio/gpio-dwapb.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/gpio/gpio-dwapb.c b/drivers/gpio/gpio-dwapb.c
index f6ae69d5d644..e3011d4e17b0 100644
--- a/drivers/gpio/gpio-dwapb.c
+++ b/drivers/gpio/gpio-dwapb.c
@@ -581,7 +581,8 @@ static struct dwapb_platform_data *dwapb_gpio_get_pdata(struct device *dev)
 			pp->ngpio = DWAPB_MAX_GPIOS;
 		}
 
-		pp->gpio_base	= -1;
+		if (fwnode_property_read_u32(fwnode, "gpio-base", &pp->gpio_base))
+			pp->gpio_base = -1;
 
 		/*
 		 * Only port A can provide interrupts in all configurations of
-- 
2.30.2